/* ==========================================================================
   Christmas login theme
   Active only when <html> has `login-christmas` (set in accounts/login.html
   from the browser's last signed-in Christmas theme) and the site-wide
   CHRISTMAS_LOGIN_THEME_ENABLED setting renders this file.
   Purely visual: form fields, CSRF, validation and the theme toggle are untouched.
   ========================================================================== */

html:not(.login-christmas) .xmas-only {
    display: none !important;
}

html.login-christmas body.page-login {
    --xc-ink: #0b1d3a;
    --xc-muted: #44516a;
    --xc-faint: #556277;
    --xc-icon: #6b778c;
    --xc-glass: rgba(255, 255, 255, 0.55);
    --xc-glass-border: rgba(255, 255, 255, 0.78);
    --xc-input-bg: rgba(255, 255, 255, 0.74);
    --xc-input-border: rgba(255, 255, 255, 0.92);
    --xc-focus: #1e7bff;
    --xc-divider: rgba(68, 81, 106, 0.32);
    --xc-snowflake: #4f7fd9;
    background: #b8c4de !important;
    color: var(--xc-ink);
}

html.login-christmas body.page-login.dark-mode {
    --xc-ink: #f2f6ff;
    --xc-muted: #c7d1e6;
    --xc-faint: #b3bfd7;
    --xc-icon: #a3b2cf;
    --xc-glass: rgba(20, 28, 55, 0.6);
    --xc-glass-border: rgba(196, 214, 255, 0.24);
    --xc-input-bg: rgba(12, 20, 44, 0.58);
    --xc-input-border: rgba(196, 214, 255, 0.22);
    --xc-focus: #5ea2ff;
    --xc-divider: rgba(199, 209, 230, 0.3);
    --xc-snowflake: #9cc2ff;
    background: #0b1430 !important;
}

/* The shared animated orbs and liquid-glass wash would tint the snow scene. */
html.login-christmas body.page-login .ambient-mesh,
html.login-christmas body.page-login .login-hero::before,
html.login-christmas body.page-login .login-hero::after {
    display: none !important;
}

/* --------------------------------------------------------------------------
   Background scene + falling snow (behind the card)
   -------------------------------------------------------------------------- */

.xmas-scene {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.xmas-scene::before,
.xmas-scene::after,
.xmas-scene__glow,
.xmas-scene .xmas-snow {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.xmas-scene::before {
    content: "";
    z-index: 0;
    /* Soft haze pools behind the card so the busy corners never compete with the form. */
    background:
        radial-gradient(ellipse 36% 50% at 50% 46%, rgba(228, 234, 247, 0.4) 0%, rgba(228, 234, 247, 0.16) 62%, rgba(228, 234, 247, 0) 100%),
        #b8c4de url("../img/login-christmas-bg.fa305a8f69af.webp") center / cover no-repeat;
    transition: filter 0.4s ease;
}

/* Night tint (dark mode only) */
.xmas-scene::after {
    content: "";
    z-index: 1;
    opacity: 0;
    background:
        radial-gradient(120% 70% at 50% 0%, rgba(6, 12, 40, 0.5), transparent 70%),
        linear-gradient(180deg, rgba(8, 16, 52, 0.55) 0%, rgba(10, 22, 62, 0.42) 55%, rgba(8, 16, 48, 0.5) 100%);
    transition: opacity 0.4s ease;
}

/* Warm light bloom isolated from the same photo, screened back over the darker scene. */
.xmas-scene__glow {
    z-index: 2;
    display: none;
    background: url("../img/login-christmas-bg.fa305a8f69af.webp") center / cover no-repeat;
    filter: url("#xmas-warm-glow");
    mix-blend-mode: screen;
    opacity: 0.85;
}

.xmas-scene .xmas-snow {
    z-index: 3;
    width: 100%;
    height: 100%;
}

.xmas-filter-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

body.dark-mode .xmas-scene::before {
    filter: brightness(0.62) saturate(1.12);
}

body.dark-mode .xmas-scene::after {
    opacity: 1;
}

body.dark-mode .xmas-scene__glow {
    display: block;
}

/* --------------------------------------------------------------------------
   Frosted glass card
   -------------------------------------------------------------------------- */

html.login-christmas body.page-login .login-card {
    overflow: visible;
    contain: none;
    border-radius: 24px;
    color: var(--xc-ink);
    background: var(--xc-glass) !important;
    border: 1px solid var(--xc-glass-border) !important;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.55),
        0 28px 64px -22px rgba(14, 30, 70, 0.5),
        0 10px 24px -14px rgba(14, 30, 70, 0.35) !important;
    -webkit-backdrop-filter: blur(14px) saturate(135%);
    backdrop-filter: blur(14px) saturate(135%);
}

html.login-christmas body.page-login.dark-mode .login-card {
    box-shadow:
        inset 0 1px 0 rgba(196, 214, 255, 0.16),
        0 28px 70px -20px rgba(0, 0, 0, 0.7) !important;
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    html.login-christmas body.page-login .login-card {
        background: rgba(255, 255, 255, 0.88) !important;
    }

    html.login-christmas body.page-login.dark-mode .login-card {
        background: rgba(20, 28, 55, 0.92) !important;
    }
}

/* The refraction lens bleeds outside the card once overflow is visible. */
html.login-christmas body.page-login .login-card__lens {
    display: none;
}

html.login-christmas body.page-login .login-card > .xmas-card-frost.xmas-only {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: inherit;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.95' numOctaves='2' seed='8'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 10 0 0 0 -6.1'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23f)'/%3E%3C/svg%3E");
    box-shadow: inset 0 0 18px rgba(255, 255, 255, 0.55), inset 0 0 3px rgba(255, 255, 255, 0.7);
    -webkit-mask-image: radial-gradient(120% 95% at 50% 50%, transparent 58%, #000 100%);
    mask-image: radial-gradient(120% 95% at 50% 50%, transparent 58%, #000 100%);
    opacity: 0.75;
}

html.login-christmas body.page-login.dark-mode .login-card > .xmas-card-frost.xmas-only {
    box-shadow: inset 0 0 18px rgba(196, 214, 255, 0.16);
    opacity: 0.32;
}

/* SVG overlay (snow, wire, bulbs) built by login-christmas.js */
html.login-christmas body.page-login .login-card > .xmas-card-deco.xmas-only {
    position: absolute;
    inset: calc(var(--xmas-deco-pad, 60px) * -1);
    z-index: 4;
    pointer-events: none;
}

.xmas-card-deco svg {
    position: absolute;
    inset: 0;
    display: block;
    overflow: visible;
}

/* Cache the filtered snow/wire and glass bulbs independently of the glow layers. */
.xmas-deco-static,
.xmas-deco-lights {
    will-change: transform;
}

.xmas-frost-specks,
.xmas-crystals {
    fill: #ffffff;
}

.xmas-snow {
    fill: url(#xmas-puff);
}

.xmas-frost {
    opacity: 0.6;
}

body.dark-mode .xmas-frost {
    opacity: 0.22;
}

.xmas-cap-shadow {
    fill: rgba(46, 72, 128, 0.34);
}

.xmas-wire {
    fill: none;
    stroke: #0e2a17;
    stroke-width: 2.6;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.xmas-wire--back {
    stroke: #04100a;
}

.xmas-wire-highlight {
    fill: none;
    stroke: #6fa47a;
    stroke-width: 0.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.55;
}

.xmas-wire-shadow {
    fill: none;
    stroke: rgba(18, 36, 70, 0.32);
    stroke-width: 3.4;
}

.xmas-socket-ribs {
    fill: none;
    stroke: rgba(0, 0, 0, 0.45);
    stroke-width: 0.45;
}

.xmas-bulb__facets {
    fill: none;
    stroke: rgba(255, 255, 255, 0.22);
    stroke-width: 0.45;
}

.xmas-bulb__rim {
    fill: none;
    stroke: rgba(255, 255, 255, 0.55);
    stroke-width: 0.7;
    stroke-linecap: round;
}

.xmas-bulb__filament {
    fill: none;
    stroke: #ffffff;
    stroke-width: 0.5;
    stroke-linejoin: round;
    opacity: 0.95;
}

.xmas-bulb__shine {
    fill: rgba(255, 255, 255, 0.85);
}

.xmas-bulb__glint {
    fill: #ffffff;
}

.xmas-bulb__bloom {
    opacity: 0.3;
}

body.dark-mode .xmas-bulb__bloom {
    opacity: 0.5;
}

.xmas-halos {
    opacity: 1;
}

.xmas-deco-glows {
    will-change: opacity;
    animation: xmas-twinkle var(--twinkle-duration, 3s) ease-in-out var(--twinkle-delay, 0s) infinite;
}

/* At night the light adds onto the scene instead of painting over it. */
body.dark-mode .xmas-deco-glows {
    mix-blend-mode: screen;
}

html.xmas-effects-paused .xmas-deco-glows {
    animation-play-state: paused;
}

body.dark-mode .xmas-halos {
    opacity: 1;
}

body.dark-mode .xmas-frost-specks {
    opacity: 0.45;
}

body.dark-mode .xmas-cap-shadow {
    fill: rgba(0, 6, 24, 0.5);
}

body.dark-mode .xmas-wire-shadow {
    stroke: rgba(0, 0, 0, 0.45);
}

@keyframes xmas-twinkle {
    0%, 100% { opacity: 1; }
    42% { opacity: 0.95; }
    52% { opacity: 0.5; }
    66% { opacity: 0.92; }
}

/* --------------------------------------------------------------------------
   Card content
   -------------------------------------------------------------------------- */

html.login-christmas body.page-login .login-card .login-card__brand {
    position: relative;
    margin-bottom: 1.5rem;
}

html.login-christmas body.page-login .login-card .login-card__logo {
    border-radius: 16px;
    background: #fff;
    filter: drop-shadow(0 10px 22px rgba(14, 30, 70, 0.22));
}

html.login-christmas body.page-login .login-card .login-card__title {
    margin-bottom: 0.3rem;
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--xc-ink) !important;
}

html.login-christmas body.page-login .login-card .login-card__subtitle {
    margin-bottom: 1.5rem;
    color: var(--xc-muted) !important;
}

/* --------------------------------------------------------------------------
   Inputs (icon + placeholder-style label; label stays the accessible name)
   -------------------------------------------------------------------------- */

html.login-christmas body.page-login .login-card .login-form__fields {
    gap: 0.9rem;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: none;
    box-shadow: none;
}

html.login-christmas body.page-login .login-card .login-form__group + .login-form__group {
    border-top: 0;
}

html.login-christmas body.page-login .login-card .login-form .form-control {
    min-height: 3.25rem;
    padding: 0 1rem 0 2.9rem !important;
    border: 1px solid var(--xc-input-border) !important;
    border-radius: 12px !important;
    background: var(--xc-input-bg) !important;
    color: var(--xc-ink) !important;
    caret-color: var(--xc-focus);
    box-shadow: inset 0 1px 2px rgba(14, 30, 70, 0.06) !important;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

html.login-christmas body.page-login .login-card .login-form .form-control:focus,
html.login-christmas body.page-login .login-card .login-form .form-control:focus-visible {
    outline: none;
    border-color: var(--xc-focus) !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--xc-focus) 38%, transparent) !important;
}

html.login-christmas body.page-login .login-card .login-form input:-webkit-autofill {
    -webkit-text-fill-color: var(--xc-ink);
    caret-color: var(--xc-focus);
}

html.login-christmas body.page-login .login-card .login-form__group > label,
html.login-christmas body.page-login .login-card .login-form__group:focus-within > label,
html.login-christmas body.page-login .login-card .login-form__group > input:focus ~ label {
    top: 1rem !important;
    left: 2.9rem;
    right: 1rem;
    font-size: 1rem !important;
    line-height: 1.25rem;
    color: var(--xc-faint) !important;
    opacity: 1;
    transition: opacity 0.12s ease;
}

/* Hide the placeholder-style label once a value exists, exactly like a native placeholder. */
html.login-christmas body.page-login .login-card .login-form__group > input:not(:placeholder-shown) ~ label {
    opacity: 0;
}

html.login-christmas body.page-login .login-card .login-form__icon {
    position: absolute;
    top: 0;
    left: 1rem;
    z-index: 2;
    display: flex;
    align-items: center;
    height: 3.25rem;
    font-size: 1.05rem;
    color: var(--xc-icon);
    pointer-events: none;
}

html.login-christmas body.page-login .login-card .invalid-feedback {
    padding: 0.4rem 0.25rem 0;
}

html.login-christmas body.page-login .login-card .alert {
    position: relative;
    z-index: 3;
}

/* --------------------------------------------------------------------------
   Sign in button
   -------------------------------------------------------------------------- */

/* 19px bold counts as large text, keeping white text >= 3:1 across the whole gradient. */
html.login-christmas body.page-login .login-card .login-card__submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    overflow: visible;
    margin-top: 0.15rem;
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    font-size: 1.1875rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(90deg, #1e7bff 0%, #0a5ce0 100%) !important;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 10px 22px -10px rgba(10, 92, 224, 0.7);
}

/* Keep liquid-glass.js's submit spinner readable: hide label + arrow while loading. */
html.login-christmas body.page-login .login-card .login-card__submit[data-loading="true"] {
    color: transparent;
}

html.login-christmas body.page-login .login-card .login-card__submit:hover {
    filter: brightness(1.05);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.36),
        0 12px 28px -8px rgba(30, 123, 255, 0.75),
        0 0 26px rgba(30, 123, 255, 0.45);
}

html.login-christmas body.page-login .login-card .login-card__submit:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 2px;
    box-shadow: 0 0 0 6px var(--xc-focus);
}

html.login-christmas body.page-login .login-card .login-card__submit-arrow {
    font-size: 1.05em;
    line-height: 1;
    transition: transform 0.18s ease;
}

html.login-christmas body.page-login .login-card .login-card__submit:hover .login-card__submit-arrow {
    transform: translateX(3px);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

html.login-christmas body.page-login .login-card .login-card__footer {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin: 1.5rem 0 0;
    color: var(--xc-muted) !important;
    white-space: normal;
}

html.login-christmas body.page-login .login-card .login-card__footer::before,
html.login-christmas body.page-login .login-card .login-card__footer::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--xc-divider);
}

html.login-christmas body.page-login .login-card .login-card__snowflake {
    display: block;
    margin-top: 0.5rem;
    text-align: center;
    font-size: 0.95rem;
    line-height: 1;
    color: var(--xc-snowflake);
}

/* --------------------------------------------------------------------------
   Responsive + motion
   -------------------------------------------------------------------------- */

@media (max-width: 640px), (max-height: 700px) {
    html.login-christmas body.page-login .login-card .login-card__brand {
        margin-bottom: 1rem;
    }

    html.login-christmas body.page-login .login-card .login-card__subtitle {
        margin-bottom: 1rem;
    }

    html.login-christmas body.page-login .login-card .login-card__footer {
        margin-top: 1rem;
    }
}

@media (max-width: 520px) {
    /* Keep the snowy middle of the scene; the corner props crop away. */
    .xmas-scene::before {
        background-position: center, 50% 62%;
    }

    .xmas-scene__glow {
        background-position: 50% 62%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .xmas-deco-glows {
        animation: none;
        will-change: auto;
    }

    html.login-christmas body.page-login .login-card .login-card__submit-arrow {
        transition: none;
    }
}